Silence_malware_1

rule Silence_malware_1 {
   meta:
      description = "Detects malware sample mentioned in the Silence report on Securelist"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://securelist.com/the-silence/83009/"
      date = "2017-11-01"
      hash1 = "f24b160e9e9d02b8e31524b8a0b30e7cdc66dd085e24e4c58240e4c4b6ec0ac2"
      id = "f932e3fe-a2d7-55b7-b581-88c0ed45723e"
   strings:
      $x1 = "adobeudp.exe" fullword wide
      $x2 = "%s\\adobeudp.exeZone.Identifier" fullword ascii
      $x3 = "%s\\igfxpers_%08x.exe" fullword ascii
      $x4 = "%s\\adobeudp.exe" fullword ascii

      $s1 = "SoftWare\\MicroSoft\\Windows\\CurrentVersion\\Run" fullword ascii
      $s2 = "Copyright (C)  1999 - 2017" fullword wide
      $s3 = "%sget.php?name=%x" fullword ascii
      $s4 = "VNASSRUNXYC" fullword wide
   condition:
      uint16(0) == 0x5a4d and filesize < 200KB and (
        pe.imphash() == "e03edb9bd7cbe200dc59f361db847f8a" or
        1 of ($x*) or
        3 of them
      )
}